Cement spreader



Nov. 2.5, 1930. R. M. HARDGROVE CEMENT SPREADER @uw INVENTOR.

BY WV Jud( ATTORNEYS.

Nov. 25, 1930. v

R. M. HARDGROVE CEMENT SPREADER Filed July l. 1927 2 Sheets sheet 2 lin'-INVENTOR- By l Wfjw( ATTORNEYS` Paterired Nov; `25, 1.1930

l UNITI?ED7fffwf.111'.Se

EALrHivLliaAREGRovE, or. ALLENTOWN, PENNSYLVANIA, .AssiGNoR To FULLER;

' LEHIGH COMPANY, "or EULLEETON, rENNsYLvANIAA `conromi'rion"orDELA-`WARE i `ductingzr natureupon tile or blocks that are to he used inconnection with boiler'furnaces that are provided4 with water walltubes, but it is to be understood kthat they invention is notrestrictedgto this particular use.

:Boiler furnace walls are soiiietimesniade `with tubesglocated `alongthe 'walls through which 1tubes water is caused to pass for the y ypurpose of keeping thewalls cool, and, at the "sa-me time, steain may begenerated in theV tubes and the tubes connected to the watercirculatorysystem'of `the boiler. -`l/Vith suoli Yurnaceablocks,of'metal are sometimes installed on the furnace side ofthe tubes and have rounded portions contacting" with l the tubes,thusproviding extensive contact area l between the blocks and the tubes.In order to procure morerapid transfer of .heat

from the blocks tothe tubesthe portions of the blocks that Contactwiththe Atubes are coated with a composition of matter, such as inelydivided carboruiidum, water glass and i glycerine, for example, that isin "a plastic condition. `By the` present invention, such "ceinentitiousor plastic `material can be: ap-

plied in a very rapidandsatisfactory inanner to the blocks.

\ `In carrying out this invention,` the material to be applied tothe-blocks is .introduced into a container and orcedlout of are passedtransversely across the exits andv Vproperlyshaped exits ,therefromwhile the blocks which the `materialis tolbe applied the distancebetween the blocks andthe ends of the exits is so` regulated as toobtain the proper thickness of the plastic material .upon

` the blocks.

'The invention willbeunderstood from the l description in connectionwith the acconil 2 is anend view ofthe same.; Figl is a secpanyingdrawingstjin which Fig. 1' isa` side view of the device, partly brokenaway; Fig.

tion along the line 3-3 of Fig. 4:, showing `some of the details', andFig. L is an end view,

partly in section, along the line 4-4 of Fig. 3.

19227;r seriali No. `zafazrf i l l y Init-he drawings, referencecharacter `10 indicates a table thatis provided with 4legs 11 forsupporting the same;` Sprocket-S12 and 13 are mounted upon suitablebearings;`

at the opposite ends of the'table sotliat the sprockets v12 `and 13extend through openingsin the table withthe upperedges orteethV i ofthesanieslightly above the vuppersurface i i otthetablelO.` The sprocket12;may.' be driven in any convenient manner `(not shown), so thatthesprocket chain 111 y"carf ried upon the sprocket wheel will` be movedin a clockwise direction. fflhe chain 14:` carries pusher lugsl attachedthlleto'at suchV intervalsgas will enable the objects to be coat-V ed tobe inserted between the lugsl. i l

1 Longitudinal Iparallel slides `or supports 16 with `smoothupper edges.are mounted uponthe upper surface of the'table 10 along whichthe blocksare pushed as described be? low. Stationary guides 17 along oppositeside edges of the blocks and stationary guides 18 along" the top` edgesof the blocks are mounted so as tolkeep the vblocks in place as -theyare pushed along theslides 16;

The blocks 201having curved portions 2li-to i whichi curved portions theplasticmaterial is to be applied, arepushed alongthe slides 16 by` meansof the lugs 15 and are". guided by the guides 17 and 18. i slideorslop-ing platform 22 iswprovided at the end ot the table upon which theblocks 20var`e` caused to slide after 16.

Upright standards or supports 25,.prei:'er

Vably Vin the Aorin of rods, are connected to they have passed ofi" Vofthe slides` se l opposite sides of the table, showiiat 25, i

and a container or vessel .26, `i'or'the plastic lmaterial is providedwith pairs of; lugs 2'? on opposite sides thereof having holestherethrough-'for the supports 25. A cross pi n.28 provided in one ofthe supports -25`land serves as a pivot forthe bifurcated cani 29 that.is provided .with a handle 30. l "The pin.

28 is so located that the cam 29 is positioned underoiie of thelugs27an'd'limits thelowermostposition of the ontainer 26. A; series of,holesmay be provided inthe support 25 to permit the container 26`todescend to diiferent distances in accordance with the position of thepivot pin 2S.

rlhe container 2G is provided with a pivoted cover 8l and a yolre 32 ispiovided on pivots 38 on opposite sides ot the container 26. The yole isprovided with a hand screw `3i which contacts with the upper side of thecover 8l t0 press the saine into firm engagement with the container 26.A gasket may be provided around the rim of the container so that thejoint can be made air tight. Anopening 85 is provided near the top ofthe container to which an air pressure pipe 36 may be conire-cted lfromany convenient source of compressed air. A pressure reducing valve 37 isprovided in the air supply pipe, which can be set fordiilferent.pressures in accordance with the thickness or fluidity of theplastic material in the container 26.

'ln'o outlets `38 are provided at the :ottoni ot the container near theopposite edges ot the table l0 and the lower end olA each one terminatesiii an elongated curved mouth 39 of substantially the same shape as thatof the curved surfaces of the blocks Q0 to which the cement is to beapplied. It is sometimes `found advisable to apply the cement somewhatmore thickly at one portion of the surp face than at another, and thiscan be readily *done* by suitably shaping the enos of ythe mouths 3S).

The operation is as follows: The sprocket chain 11i is driven to revolvein a clockwise direction as seen in Fig. l, and the blocks 2O that areto have their curved surfaces coated with plastic material are placed infront ot the lugs l5 as they pass around the sprocket 13, so that acontinuous row of the blocks pass transversely of the open mouths 39.The weight of the material in the container QG forces the same out ofthe mouths 39 and causes the same to be spread upon the curved faces 2lot the blocks 20 as they pass by the mouths and, in case the material ittoo stitl or thick to pass out of the mouths by its own weight,compressed air is introduced into the container through the pipe 36 andthereby 'forces the material ont and upon the blocks 1 proximity to saidguide, guides for sani con- 20. Only a slight amount of the plasticniaterial passes into the spaces between the blocks 20 as they pass bythe mouths, and this slight amount can be removed by hand as the blockspass onto the sloping platform 22. The vertical position ot' thecontainer 26 can be regulated to some extent by adjusting the cam 28,and the container Q6 can be iilled with charges of the material atintervals by removing the cover 3l.

I claim:

l. A cement spreader for curved surfacescement is to be spread, andmeans for moving `jects,

means to cause saidiobjects to an object having a curved surface acrosssaid exit.

2. A cement spreader for curved surfaces comprising a container for thecement having an exit the end of which is curved to correspond to thesurface upon which the cement is Lto be spread, means for moving anobject having a curved surface across said exit, and guides for saidobject.

A cement spreader for curved surfaces comprising a container for thecement having an exit the end of which is curved to correspond to thesurface upon which the cement is to be spread, and means for movingl anobject having a curved surface across said exit, said means comprising asprocket chain with lugs thereon.

4. In a. device for spreading plastic matei'ial upon curved surfaces ofobjects, a container for said material having oppositely disposed curvedexit openings, and means for passing the objects between said openings.Y j

5. In a device for spreading plastic material upon curved surfaces ofobjects, a container for said material having' oppositely disposedcurved exit openings, and means ttor passing a series ot objects insuccession transversely between said openings in proximity thereto.

6. In a device for applying ay layer of plastic material to objects, ahorizontal guide for said objects having means to prevent lateral orvertical movement of said oba container for plastic mounted iiiproximity to said guide, guides for said container to permit onlyvertical Vmovement thereof', an enit opening from said container, aportion of which issubstantiallyv vertical and located below the tops ofsaid objects as they pass along their guide, and

pass trans- -versely across said exit opening. Y

7. In a device for applying a layer of plastic material to objects, ahorizontal guide for said objects havingr means` to prevent lateral orvertical movement ot said objects, a container for plastic materialmounted in taiiier to permit only vertical movement tlieretor, saidcontainer having exit openings lacing each other, and means to passobjects Aalong said guide between said openings.

Yis to be spread, and means `for moving an object yhaving a curvedsurface across |said exit, a portion oil-which lies in a substantiallyvertical plane.

Y RALPH M. HARDGROVE.

material i

